c语言连接mysql

#include <mysql/mysql.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[])
{
    MYSQL mysql;
    MYSQL_ROW row;
    MYSQL_RES *result;

    unsigned int num_fields;
    unsigned int i;

    mysql_init(&mysql);
    
    puts("Content-type: text/html\r\n\r\n");
    if(!mysql_real_connect(&mysql, "127.0.0.1", "root", "","test",3306,NULL,0))
    {
        printf("connection failed,%s\n",mysql_error(&mysql));
    }
    
    mysql_query(&mysql,"SET NAMES utf8");
    if(!mysql_query(&mysql,"SELECT * FROM test"))
    {
         result = mysql_store_result(&mysql);

         if(!result)
         {
            perror("result");
            exit(1);
         }
         num_fields = mysql_num_fields(result);

         while(row = mysql_fetch_row(result))
         {
            for(i=0; i<num_fields; i++)
            {
                printf("%s\t",row[i]);
            }

            printf("\n");
         }

         mysql_free_result(result);

    }
    mysql_close(&mysql);
    printf("connection ok!");
}